const Koa = require('koa')
const app = new Koa()
const views = require('koa-views')
const json = require('koa-json')
const onerror = require('koa-onerror')
const bodyparser = require('koa-bodyparser')
const logger = require('koa-logger')
const cors=require('koa2-cors')

const index = require('./routes/index')
const users = require('./routes/users')
const test = require('./routes/test')
const mp = require('./routes/mp')
const { handleResponse } = require('./middleware/index')
const session=require('koa-session')

// error handler
onerror(app)
app.use(
  cors({
    origin: function (ctx) {
      console.log('url',ctx.url)
      if (ctx.url.indexOf('/test') >-1) {
        return '*'
      }
      return 'http://127.0.0.1:8001'
    }
  })
)
const store = {
  storage: {},
  set(key, session) {
    this.storage[key]=session
  },
  get(key) {
    return this.storage[key]
  },
  destroy(key) {
    delete this.storage[key]
  }
}
// middlewares
app.use(bodyparser({
  enableTypes:['json', 'form', 'text']
}))
app.use(json())
app.use(logger())
app.use(require('koa-static')(__dirname + '/public'))

app.use(views(__dirname + '/views', {
  extension: 'pug'
}))

// logger
app.use(async (ctx, next) => {
  const start = new Date()
  await next()
  const ms = new Date() - start
  console.log(`${ctx.method} ${ctx.url} - ${ms}ms`)
})
app.use(session({store},app))//session
app.use(handleResponse)//统一处理响应
// routes
app.use(index.routes(), index.allowedMethods())
app.use(users.routes(), users.allowedMethods())
app.use(test.routes(), users.allowedMethods())
app.use(mp.routes(),users.allowedMethods())

// error-handling
app.on('error', (err, ctx) => {
  console.error('server error', err, ctx)
});

module.exports = app
